/Engine/Source/Runtime/Engine/Public/SkeletalRenderPublic.h
Draw Normals/Tangents based on skinned vertex data
virtual void DrawVertexElements ( [FPrimitiveDrawInterface](API\Runtime\Engine\FPrimitiveDrawInterface) * PDI, const FMatrix & ToWorldSpace, bool bDrawNormals, bool bDrawTangents, bool bDrawBinormals ) const